Engine Lubrication System Symptom Troubleshooting - Low oil pressure indicator stays on
Low oil pressure indicator stays on
1.
Gauge control module test:

Gauge control module test
?1.
Connect the HDS to the DLC.

?2.
Check for DTCs. If a DTC is present, diagnose, and repair the cause before continuing with this test.


?3.
Start the engine, and check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
OIL PRESSURE SWITCH
OFF
      

Do the current condition(s) match the threshold?

     
YES
     
     
     
     
NO
     
     
     
Go to step 2.
2.
Oil pressure switch test:

Oil pressure switch test
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Check the oil pressure switch.

Is the oil pressure switch OK?

     
YES (1.5 L engine)
     
     
     
Go to step 3.
     
YES (2.4 L engine)
     
     
     
Go to step 4.
     
NO
     
     
     
3.
Shorted wire check (ENG OPSW line):

Shorted wire check (ENG OPSW line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.
NOTE: This step must be done to protect the PCM from damage.


?3.
Disconnect the following connectors.
PCM connector E (80P)
Oil pressure switch 1P connector

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
PCM connector E (80P) : disconnected
Oil pressure switch 1P connector: disconnected
Test point 1
Oil pressure switch 1P connector (female terminals) No. 1:
Test point 2
Body ground
 


Is there continuity?

     
YES
     
     
     
Repair a short to ground in the ENG OPSW wire between the oil pressure switch and the PCM.?
     
NO
     
     
     
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If the PCM was substituted, and the symptom/indication goes away, replace the original PCM.?
4.
Shorted wire check (ENG OP SW line):

Shorted wire check (ENG OP SW line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.
NOTE: This step must be done to protect the PCM from damage.


?3.
Disconnect the following connectors.
PCM connector B (51P)
Oil pressure switch 1P connector

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
PCM connector B (51P): disconnected
Oil pressure switch 1P connector: disconnected
Test point 1
Oil pressure switch 1P connector (female terminals) No. 1:
Test point 2
Body ground
 


Is there continuity?

     
YES
     
     
     
Repair a short to ground in the ENG OP SW wire between the oil pressure switch and the PCM.?
     
NO
     
     
     
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If the PCM was substituted, and the symptom/indication goes away, replace the original PCM.?